taylor



2 SheetsSheet 1.

Patented Nov. 4, 1890.

(No Model.)

H. H. TAYLOR.

GRINDING MACHINE.

(N0 MOdBl.) 2 Sheets-Sheet 2.

H. H. TAYLOR.

GRINDING MACHINE.

No. 439,766. Patente d Nov. 4, 1890.

qwitweb oeo I M mi - UNIT D STATES PATENT OFFIC HARRISON II. TAYLOR, OF DETROIT, MICHIGAN, ASSIGNOR TO THE DETROIT MACHINE SCREW IVORKS, OF SAME PLACE.

GRINDING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 439,766, dated November 4, 1890. Application filed May 5, 1890. Serial Nb. 350,649. (No model.)

T at whom it may concern.-

Be it known that I, HARRISON H. TAYLOR,

a citizen of the United States, residing at Detroit, county of Wayne, State of Michigan, have invented a certain new and useful Improvement in a Grinding-Machine; and I declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification.

My present invention has for its object certain new and useful improvements in grinding-machines, and more particularly has reference to a machine for grinding pieces with heads, whereby the grinding-wheels will be kept truer than heretofore, their grindingsurfaces wearing evenly from one side to the other. My purpose is to provide a machine for this purpose simple and economical in construction and rapid and efficient in its operation.

To these ends my invention consists of the combinations of devices and appliances hereinafter specified and claimed and disclosed in the accompanying drawings, in which-- Figure 1 is an end elevation of a machine embodying my invention. Fig. 2 is a plan view of certain features of the machine. Fig. 3 is a separate view of one of the shafts and its connections. Fig. 4 is a detail view of one end of one of the shafts, and Fig. 5 is a detail view of one of the boxings for said end. Fig. 6 is a side elevation showing the engagement of the driving-belts therewith.

I carry out my invention as follows:

Arepresents a supporting-frame.

B and B denote rotatable shafts journaled upon said frame, each carrying a grindingwheel C C and provided with a driving-pulley B A and A denote boxings upon the frame, through which the shaft has a longitudinallyreciprocating movement. Said shafts are so arranged and connected upon the frame as to be adjustable to and from each other to bring the peripheries of the grindingwheels nearer together or farther apart, as may be required to properly grind the work,

which I so arrange as to bring to bear between the wheels, so that two surfaces may be simultaneously ground, thereby effecting a very considerable saving of time, since an attendant is enabled to do double the work.

To effect the longitudinal reciprocation of 5 5 the shafts on which the grinding-wheels are mounted, they are each connected with an eccentric D, engaged upon a shaft E in the customary manner, the shaft being provided withaworm-gear E. This worm-gear meshes with a threaded spindle F, provided with a driving-pulley F. To regulate the reciprocation of the shafts B B each is provided with a slotted adj usting-arm G, pivotally connected with the shaft, as shown at a. The slot 9 in said arm is of arc shape. The eccentric-strap D is connected adjustably with the slotted arm in any suitable manner, as by a rod D and angular arm D having one extremity passed through said slot and held in place in any position to which it may be set by a nut D An arm H, engaged upon the shaft E at one end, also engages the slotted arm at the opposite end and serves as a support therefor.

It will be evident that by adjusting the ec centric-connection in the slotted arm nearer to or farther from the point of connection of said arm with the shaft the amount of the reciprocation will be governed accordingly.

I do not limit myself to any particular manner of engaging the shafts with the slotted arms, respectively; but as shown the shafts are each rotatably engaged with a bifurcated head or boxing I, the slotted arm being connected with the forked end thereof, the opposite end being constructed with an orifice I to receive the endof the shaft, said shaft being preferably cut down to enter said box ing, as shown at a, and provided with an annular recess a in which retaining-pins may ride to hold the shaft in engagement with the boxing and leave the shaft free to turn therein.

To bring the work to the grinding-wheels,

I employ a socket J, constructed to receive the shank of the headed pieces. The socket is located on a lever-arm J, j ointedly engaged upon the frameA and connected with a weight K by a cable K.

L is an operating-lever, its lower end arranged to hold the work Z between it and the socket.

Located upon the frame is a stop j to limit the retraction of the socket J. It will be seen that the weight holds the socket down upon the'lower end of the lever L, yet when the socket-arm strikes the stop, j the upper end of the lever may be thrown up, so as to permit the insertion of the work in the socket.

M and N are the belts driving the two grinding-wheels, and P Q represent the shafting, provided with pulleys P and Q.

gular face being adjusted in said ways in any suitable manner, as by an adjusting-screw V. The frame of the machine is placed in such a position that the angular faces, respectively, and the driving-belts of the respective wheels are at right angles to each other. This evidently will permit the lateral adjustment of the respective grinding-wheels for smaller-or larger work, as may be required, Without changing at all the relation of the belts, respectively, which run the grindingwheels, so that practically the belts are neither tightened nor slackened by adjusting the grinding-wheels nearer together or farther apart, allowing the same machine thus to be adjusted for different sizes of work, as may be desired.

What I claim as my invention is- 1. In a grinding-machine, the combination of the supportingframe and the driving shafts, each having a longitudinal reciprocatory movement and provided with a grinding-wheel, the reciprocation of said shafts alternating, substantially as set forth.

2. In a grin ding-machine, the combination, with the supporting-frame, of driving-shafts provided with grinding-wheels and a swinging frame to support the work, said frame pivoted to the supporting-frame, means for exerting force to hold the said swinging frame away from the grinding-wheels, a stop for limiting the retraction of said swinging frame, and a lever for swinging the frame with its work to the grinding-wheels.

3. In a grinding-machine, the combination, with a supporting-frame, of the reciprocatory driving-shafts provided with grinding-wheels, a weighted socket to engage the work, and a lever to bring the work to the wheels, substantially as set forth.

4. In a grinding-machine, the combination, with the supporting-frame, of longitudinallymovable driving-shafts provided with grinding-wheels, a shaft E, cams mounted on said shaft, supporting-arms H, links G, pivoted to said supporting-arms and to said shafts, connections between said links and cams and made adjustable one with respect to the other, and Ineans'for rotating the shaft carrying the cams.

. 5. In combination, the supportingframe provided with angular faces and Ways V, located thereupon, driving-shafts located upon said angular faces, and means for adj ustingsaid shafts toward and fromeach other, substantially as set forth. I

In testimony whereof I sign this specification in the presence of two witnesses.

HARRISON H. TAYLOR. Witnesses:

N. S. WRIGHT, CHAS. F. SALOW. 

